LERF - New life for the jefferson laboratory FEL

C. Tennant, S. Benson, J. Boyce, J. Coleman, D. Douglas, S. Frierson, J. Gubeli, C. Garcia, K. Jordan, C. Keith, R. Legg, M. McCaughan, M. Spata, T. Satogata, M. Tiefenback, S. Zhang, J. Balewski, J. Bernauer, J. Bessuille, R. CorlissR. Cowan, C. Epstein, P. Fisher, I. Friscic, D. Hasell, E. Ihloff, J. Kelsey, S. Lee, P. Moran, R. Milner, D. Palumbo, S. Steadman, C. Tschalär, C. Vidal, Y. Wang, T. Cao, B. Dongwi, P. Gueye, N. Kalantarians, M. Kohl, A. Liyanage, J. Nazeer, R. Alarcon, D. Blyth, R. Dipert, L. Ice, G. Randall, B. Thorpe, R. Cervantes, K. Dehmelt, A. Deshpande, N. Feege, P. Evtushenko, M. Garçon, B. Surrow

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

In 2012 Jefferson Laboratory's energy recovery linac (ERL) driven Free Electron Laser successfully completed a transmission test in which high current CW beam (4.3 mA at 100 MeV) was transported through a 2 mm aperture for 7 hours with beam losses as low as 3 ppm. The purpose of the run was to mimic an internal gas target for DarkLight [1] - an experiment designed to search for a dark matter particle. The ERL was not run again until late 2015 for a brief re-commissioning in preparation for the next phase of DarkLight. In the intervening years, the FEL was rebranded as the Low Energy Recirculator Facility. In 2016 several weeks of operation were allocated to configure the machine for DarkLight with the purpose of exercising - for the first time - an internal gas target in an ERL. Despite a number of challenges, including the inability to energy recover without losses (precluding CW operation), beam was delivered to a target of thickness 1018 cm-2 which represents a three order of magnitude increase in thickness from previous internal target experiments. Details of the machine configuration and operational experience will be discussed.

Original languageEnglish (US)
Title of host publicationProceedings of ERL 2017, the 59th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linacs
PublisherJoint Accelerator Conferences Website (JACoW)
Pages45-48
Number of pages4
ISBN (Electronic)9783954501908
DOIs
StatePublished - Apr 1 2018
Event59th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linacs, ERL 2017 - Geneva, Switzerland
Duration: Jun 18 2017Jun 23 2017

Publication series

NameProceedings of ERL 2017, the 59th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linacs

Conference

Conference59th ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linacs, ERL 2017
CountrySwitzerland
CityGeneva
Period6/18/176/23/17

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Radiation
  • Electrical and Electronic Engineering

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